Portable platform



1947. F. LANCHESTER PORTABLE PLATFORM Fil ed Aug. 4, 1945 e Sheets-Sheet x I Ill 1 um um I NOV. 1947. F. LANCHESTER' PORTABLE PLATFORM- Filed Aug. 4; 1945 6 Sheets-Sheet 2 Nov. 4, 1947.

F, LANCHESTER PORTABLE PLATFORM 6 Shets-Sheet s Filed Aug. 4, 1945 H llillllll l l l l l l 1 ll I INH L EE? Nov. '4, 1947. F. LANcHEs E PORTABLE PLATFORM 6 Shets-Sheet 4 Fild Aug. 4, 1945 mbanzzioz jazz/cheater Nov. 4, 1947. F. I ANCHESTVIYER 6 Sheets-Sheet 5 PORTABLE PLATFORM Filed Aug. 4, 1945 Tjmqfiea'ber NW. 4, 1947. F, LANCHESTER PORTABLE PLATFORM 6 Sheets-Sheet 6 Filed Aug. 4, 1945 Lam - 1120 v elzicz I F am 0h ens-Z61 @W Patented Nov. 4, 1947 UNITED STATES TENT FFICE Application August 4, 1.945, Serial No. 608,984 In Great Britain June 20, 1944 This invention has for its object to provide an apparatus for use more particularly by brick layers in the construction of dwellings, but applicable also to other analogous uses.

The invention in brief consists in a road vehicle embodying a horizontal frame, at least two platforms thereon, one platform serving to carry the construction and another to carry building materials, means for raising and depressing said platforms independently on vertical lines normal to fixed points on the respective platforms to occupy any of an infinite number of selected positions and means for constantly maintaining the platforms in horizontal positions during said raising and depressing operations.

Referring to the accompanying diagrammatic drawings Figure 1 is a side View of one convenient construction of portable apparatus embodying the present invention.

Figure 2 is an end view thereof.

Figure 3 is a side view of a modified construction,

Figure 4 being an end view thereof.

Figure 5 is a side view of a further modified construction, and

Figure 6 is an end view thereof.

In one mode of. carryin the invention into effeet, as illustrated by way of example in Figures 1 and 2, I employ a base a which forms part of a movable vehicle furnished with a pair of wheels bb, the said base being provided with four adjustable feet c, whereby it can be supported rigidly upon the ground. On this base are secured four rigid upright posts 11 serving to carry a pair of separate and independently movable platforms e the latter being slidable upwardly or downwardly on the posts. The length of the posts is such as will allow the platforms to be elevated to an extent convenient to the building of (for example) dwellings of one or more stories. One of the platforms serves to carry the constructor, and the other to carry bricks and other building materials. As the platforms are independently movable, they can be moved to different levels, so that the one carrying the materials can be raised to a height above that occupied by the constructor, and thu support the materials in 5 Claims. (Cl. 304-29) a position in which they can be conveniently 2 screw-threaded parts g on the platforms. One of each pair of screws is rotatable by a handle it and each pair of shafts are geared together by bevel Wheels 1 and shafts 7' also furnished with handles m. Also the screw serves as an additional supporting post.

In another construction illustrated in Figures 2 and 3, each platform is carried by three extensible supports n constructed in the form of lazy tongs.

support associated with each platform for extending or contracting this support, and this screw is geared by means of bevel Wheels p and a shaft q with similar screws combined with the other extensible supports. Operating handles 1 are provided for rotating the shafts 0.

In another construction illustrated in Figures 5 and 6, I employ telescopic tubular supports s each adapted to co-operate in the manner of the ram and cylinder of a hydraulic jack, operating liquid being supplied to the interiors of the supports by a pump t carried on the base.

It will be apparent that the invention is capable of being carried out in a variety of ways, and

. is therefore not limited to such examples as those above described, but in all cases at least two independently movable platforms are provided on the one base, and the latter may conveniently form part of a trailer vehicle, though this latter feature is not essential.

By the use of two independently movable platforms, the operations involved in building of dwellings and the like can be greatly expedited and facilitated, and the need for the usual scaffolding and ladders is dispensed with. The constructor is enabled easily to adjust his position progressively to suit the increasing height of the part undergoing erection, and his mate is enabled to keep him supplied with material with a minimum of exertion.

Whilst primarily intended for use in building operations, the. invention is not limited thereto, as it may be applied to other analogous uses, and constructional details may be modified to suit different requirements.

I claim:

1. A road vehicle embodying a horizontal frame, at least two platforms thereon, one platform serving to carry the construction and another to carry building materials, means for raising and depressing said platforms independently on vertical lines normal to fixed points on the respective platforms to occupy any of an infinite number of selected positions and means for An actuating screw 0 is combined with one end of one of the lower links of one of the constantly maintaining the platforms in horizontal positions during said raising and depressing operations.

2. Portable apparatus as claimed in claim wherein the means for elevating and depressing the platforms independently comprise a plurality of screw-threaded shafts geared together in pairs, suitably positioned operating handles being provided for operating the shafts.

and is furnished with a plurality of adjustable feet.

FRANK LANCHESTER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 10 Number Name Date 2,183,679 Hilli Dec. 19, 1939 2,370,887 Soskin Mar. 6, 1945 610,602 Doldt Sept. 13, 1898 17 Castady Dec. 20, 1939 15 1,718,979 Protzeller July 2, 1929 1,960,355 Tamini May 29, 1934 FOREIGN PATENTS Number Country Date 20 494,148 Germany Mar. 19, 1939 

